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## [Speed Math] MULTIPLYING NUMBERS WITH FIRST DIGITS SUM 1000

Here’s an example of a SPEED MATH shortcut for MULTIPLYING NUMBERS WITH FIRST DIGITS SUM 1000 : (Mul) F1000dx from the MULTIPLICATION category. ### When can I use this method?

For multiplying any 4-digit number with another 4-digit number such that the sum of the initial digits of the multiplier and multiplicand = 1000 and the remaining digits of multiplier are same as that of the multiplicand.

For multiplying any 5-digit number with another 5-digit number such that the sum of the initial digits of the multiplier and multiplicand = 1000 and the remaining digits of multiplier are same as that of the multiplicand.

You cannot use this method to multiply numbers with unequal number of digits, i.e. multiplying a 4-digit number with a 5-digit number.

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[tubepress mode=”playlist” playlistValue=”PLngU_U4dGjQcBt8asM5LQPIWz4k1jZtYK”] Download Practice sheet for MULTIPLYING NUMBERS WITH FIRST DIGITS SUM 1000